Although modesty is natural to man, it is not natural to children. Modesty only begins with the knowledge of evil.
The ability to observe without evaluating is the highest form of intelligence.
Learn as though you would never be able to master it; hold it as though you would be in fear of losing it.
No man's knowledge here can go beyond his experience.
If the facts don't fit the theory, change the facts.
The most savage controversies are those about matters as to which there is no good evidence either way.
If one cannot enjoy reading a book over and over again, there is no use in reading it at all.
Free the child's potential, and you will transform him into the world.
Human behavior flows from three main sources: desire, emotion, and knowledge
The knowledge of all things is possible
The delight of opening a new pursuit, or a new course of reading, imparts the vivacity and novelty of youth even to old age.
Any knowledge that doesn't lead to new questions quickly dies out: it fails to maintain the temperature required for sustaining life.
Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information upon it.
Science is what we have learned about how to keep from fooling ourselves.
He who would learn to fly one day must first learn to stand and walk and run and climb and dance; one cannot fly into flying.
It is not enough for the teacher to love the child. She must first love and understand the universe. She must prepare herself, and truly work at it.
The task of a writer is not to solve the problem but to state the problem correctly.
Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.
For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.
All knowledge that the world has ever received comes from the mind; the infinite library of the universe is in our own mind.
Education is an ornament for the prosperous, a refuge for the unfortunate.